CN219771006U - Belt conveyor with cleaning structure - Google Patents

Abstract

The utility model discloses a belt conveyor with a self-cleaning structure, which comprises a bottom plate, wherein a conveying belt is arranged above the bottom plate, and a cleaning unit is arranged below the conveying belt; the cleaning unit comprises a roller brush, a box body, a submersible pump, a T-shaped pipe and a spray head; the roller brush is located one side below of conveyer belt, the below of roller brush is provided with the box, the box rigid coupling is in the top of bottom plate, the inner wall bottom rigid coupling of box has the immersible pump, the output intercommunication of immersible pump has T type pipe, T type pipe runs through the top of box, the top intercommunication of T type pipe has a plurality of shower nozzles. The utility model relates to the technical field of belt conveyors, which is characterized in that the cleaning of impurity dust on the surface of a conveyor belt is realized through the cooperation of a roller brush, a spray head and a submersible pump, and the conveyor belt is further effectively cleaned on the basis of the existing sweeper, so that the conveyor achieves certain sanitary safety when transporting materials such as tobacco, food and the like.

Description

Belt conveyor with cleaning structure

Technical Field

The utility model relates to the technical field of belt conveyors, in particular to a belt conveyor with a self-cleaning structure.

Background

The belt conveyer is one kind of friction driven material conveying machine comprising frame, conveyer belt, carrier roller, tensioner, transmission, etc. and is used widely in household appliance, electronic appliance, machine, tobacco, injection molding, post and telecommunications, printing, food industry, etc. When the belt conveyor conveys materials, part of the materials can remain on the conveying belt, so that friction between the materials conveyed next time and the conveying belt is reduced, and the materials conveyed next time can be polluted, and therefore the belt conveyor with the self-cleaning structure is required to clean the conveying belt.

The existing belt conveyor with a cleaning structure is usually provided with a belt cleaner to clean the upper end, the middle section and the lower section of the conveyor belt, and the cleaner comprises a spring cleaner, an empty section cleaner and the like.

However, the existing belt conveyor with the cleaning structure cannot completely remove impurity dust and the like on the conveyor belt, certain residues exist, and certain health and safety hazards exist when materials such as tobacco, food and the like are transported.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the belt conveyor with the self-cleaning structure, which solves the problems that the existing belt conveyor with the self-cleaning structure can not completely remove impurity dust and the like on a conveying belt, has certain residues and has certain health and safety hidden trouble when materials such as tobacco, food and the like are conveyed.

In order to achieve the above purpose, the present utility model is realized by the following technical scheme: the belt conveyor with the self-cleaning structure comprises a bottom plate, wherein a conveying belt is arranged above the bottom plate, and a cleaning unit is arranged below the conveying belt; the cleaning unit comprises a roller brush, a box body, a submersible pump, a T-shaped pipe and a spray head; the roller brush is located one side below of conveyer belt, the below of roller brush is provided with the box, the box rigid coupling is in the top of bottom plate, the inner wall bottom rigid coupling of box has the immersible pump, the output intercommunication of immersible pump has T type pipe, T type pipe runs through the top of box, the top intercommunication of T type pipe has a plurality of shower nozzles.

Preferably, the top rigid coupling of bottom plate has the intermediate frame, one side rigid coupling of intermediate frame has the headstock, the opposite side rigid coupling of intermediate frame has the tailstock, the top of intermediate frame is provided with a plurality of upper idler, a plurality of lower idlers are installed to the bottom of intermediate frame, the top of headstock is provided with driving roller, driving roller's outer wall links to each other with the conveyer belt activity, driving roller is connected with steering roller through the conveyer belt rotation, steering roller sets up in the inboard of tailstock, the inner wall top and the upper idler activity of conveyer belt link to each other, the inner wall bottom and the lower idler activity of conveyer belt link to each other, the cylinder brush is through round pin axle swivelling joint in the tailstock.

Preferably, a monitoring unit is arranged below the roller brush; the monitoring unit comprises a roller, an angular displacement sensor, a connecting rod and a controller; the roller is located the below of cylinder brush, the roller is connected with the connecting rod through the round pin axle rotation, the end rigid coupling of connecting rod is in the lateral wall of tailstock, angular displacement sensor is installed to the outer wall of connecting rod, one side electric connection of angular displacement sensor has the controller, the controller rigid coupling is in the lateral wall of tailstock.

Preferably, the top rigid coupling of intermediate frame has the support frame, the top rigid coupling of support frame has the motor, the output rigid coupling of motor has the belt pulley, the outer wall swing joint of belt pulley has the belt, the belt pulley rotates with driving roller mutually through the belt and links to each other.

Preferably, the inner wall of the tailstock is provided with a first adjusting unit; the first adjusting unit comprises a sliding rail and a first threaded rod; the sliding rail is fixedly connected to the bottom of the inner wall of the tail frame, the outer wall of the sliding rail is in sliding clamping connection with the steering roller, a first threaded rod is connected to the side wall of the steering roller through bearing rotation, and the first threaded rod is connected with the side wall thread of the tail frame.

Preferably, the inner wall of the middle frame is provided with a second adjusting unit; the second adjusting unit comprises a sliding block, a second threaded rod, an L-shaped plate, a first conical gear, a second conical gear and a hand wheel; the top of slider and the bottom looks rigid coupling of upper roller, slider sliding joint is in the inner wall of intermediate frame, the inner wall threaded connection of slider has the second threaded rod, the one end of second threaded rod passes through the bearing and rotates with the inner wall of intermediate frame and link to each other, the other end of second threaded rod is connected with the L template through the bearing rotation, L template rigid coupling is in the inner wall bottom of intermediate frame, the terminal rigid coupling of second threaded rod has first conical gear, one side meshing of first conical gear is connected with second conical gear, the terminal L template that runs through of second conical gear to rotate with the L template through the bearing and link to each other, the terminal rigid coupling of second conical gear has the hand wheel.

Advantageous effects

The utility model provides a belt conveyor with a cleaning structure. The beneficial effects are as follows: this from belt conveyor of taking clearance structure, cooperation through cylinder brush, shower nozzle and immersible pump realizes clearing up conveyer belt surface impurity dust for the conveyer belt obtains further effective clearance on current sweeper's basis, makes the conveyer obtain certain sanitary security when transporting materials such as tobacco, food.

Through the cooperation of gyro wheel, angular displacement sensor and controller, realized the monitoring to the number of turns is rotated to the cylinder brush, the user of facilitating the use starts the immersible pump regularly, carries out the water spray supply to the cylinder brush, and its structural design is simple simultaneously, and convenient to use person operates fast, has alleviateed user's work burden, has improved work efficiency.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the roller, angular displacement sensor and controller of FIG. 1

FIG. 3 is a cross-sectional view of the T-tube, sprinkler head and submersible pump of FIG. 1;

FIG. 4 is a schematic view of the tailstock, slide rail and first threaded rod of FIG. 1;

FIG. 5 is a schematic view of the second screw, L-shaped plate and hand wheel of FIG. 1;

fig. 6 is a cross-sectional view of the slider, L-shaped plate and hand wheel of fig. 1.

In the figure: 1. the device comprises a bottom plate, 2, a middle frame, 3, a headstock, 4, a tailstock, 5, a driving roller, 6, a steering roller, 7, a supporting frame, 8, a motor, 9, a belt, 10, a conveying belt, 11, an upper carrier roller, 12, a lower carrier roller, 13, a roller brush, 14, a box body, 15, a submersible pump, 16, a T-shaped pipe, 17, a spray head, 18, a roller, 19, an angular displacement sensor, 20, a controller, 21, a sliding rail, 22, a first threaded rod, 23, a sliding block, 24, a second threaded rod, 25, an L-shaped plate, 26, a first conical gear, 27, a second conical gear, 28, a hand wheel, 29, a connecting rod, 30 and a belt pulley.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The existing belt conveyor with the cleaning structure cannot completely remove impurity dust and the like on the conveying belt, certain residues exist, and certain potential health hazards exist when materials such as tobacco, food and the like are conveyed.

In view of the above, the utility model provides the belt conveyor with the cleaning structure, which is used for cleaning impurity dust on the surface of the conveyor belt by matching the roller brush, the spray head and the submersible pump, and further effectively cleaning the conveyor belt on the basis of the existing cleaner, so that the conveyor obtains certain sanitary safety when transporting materials such as tobacco, food and the like.

All electric parts and the adaptive power supply are connected through wires by the person skilled in the art, and a proper controller and encoder should be selected according to actual conditions so as to meet control requirements, specific connection and control sequence, and the electric connection is completed by referring to the following working principles in the working sequence among the electric parts, and the detailed connection means are known in the art, and mainly introduce the working principles and processes as follows, and do not describe the electric control.

Embodiment one: as can be seen from fig. 1 to 3, a belt conveyor with a cleaning structure comprises a base plate 1, and is characterized in that: a conveyer belt 10 is arranged above the bottom plate 1, and a cleaning unit is arranged below the conveyer belt 10; the cleaning unit comprises a roller brush 13, a box 14, a submersible pump 15, a T-shaped pipe 16 and a spray head 17; the roller brush 13 is positioned below one side of the conveying belt 10, the roller brush 13 is made of materials similar to roller brushes used for plastering walls and is divided into long hair, medium hair and short hair, a box body 14 is arranged below the roller brush 13, the box body 14 is fixedly connected to the top of the bottom plate 1, a submersible pump 15 is fixedly connected to the bottom of the inner wall of the box body 14, the model of the submersible pump 15 is not particularly limited here, the actual use requirement is met, the submersible pump 15 is started to convey water in the box body 14 into a T-shaped pipe 16, finally the roller brush 13 is sprayed through spraying heads 17, the output end of the submersible pump 15 is communicated with the T-shaped pipe 16, the T-shaped pipe 16 penetrates through the top of the box body 14, the top of the T-shaped pipe 16 is communicated with a plurality of spraying heads 17, the model of the spraying heads 17 is not particularly limited here, and the actual use requirement is met;

in the specific implementation process, the material of the roller brush 13 is similar to that of a roller brush for painting a wall body, and is divided into long hair, medium hair and short hair, the rotation of the driving roller 5 drives the steering roller 6 to rotate through the conveying belt 10, the cleaning of impurity dust on the surface of the conveying belt 10 is realized through the cooperation of the roller brush 13, the spray head 17 and the submersible pump 15, and the conveying belt 10 is further effectively cleaned on the basis of the existing cleaner, so that the conveying belt 10 obtains certain sanitary safety when conveying materials such as tobacco, food and the like;

further, the top of the bottom plate 1 is fixedly connected with a middle frame 2, the middle frame 2 is used for fixing an upper carrier roller 11 and a lower carrier roller 12, one side of the middle frame 2 is fixedly connected with a headstock 3, the headstock 3 is used for fixing a driving roller 5, the other side of the middle frame 2 is fixedly connected with a tail frame 4, the tail frame 4 is used for fixing a steering roller 6, the top of the middle frame 2 is provided with a plurality of upper carrier rollers 11, the bottom of the middle frame 2 is provided with a plurality of lower carrier rollers 12, the top of the headstock 3 is provided with a driving roller 5, the driving roller 5 rotates to drive the steering roller 6 to rotate through a conveying belt 10, the outer wall of the driving roller 5 is movably connected with the conveying belt 10, the steering roller 6 is arranged on the inner side of the tail frame 4, the top of the inner wall of the conveying belt 10 is movably connected with the upper carrier roller 11, the bottom of the inner wall of the conveying belt 10 is movably connected with the lower carrier roller 12, and a roller brush 13 is rotatably connected with the tail frame 4 through a pin shaft;

in the specific implementation process, it is worth particularly pointing out that the middle frame 2 is used for fixing the upper carrier roller 11 and the lower carrier roller 12, the headstock 3 is used for fixing the driving roller 5, the tailstock 4 is used for fixing the steering roller 6, and the driving roller 5 rotates to drive the steering roller 6 to rotate through the conveying belt 10, so that the conveying belt 10 can be used for conveying materials;

further, a monitoring unit is arranged below the roller brush 13; the monitoring unit comprises a roller 18, an angular displacement sensor 19, a connecting rod 29 and a controller 20; the roller 18 is positioned below the roller brush 13, the roller 18 is rotationally connected with a connecting rod 29 through a pin shaft, the tail end of the connecting rod 29 is fixedly connected to the side wall of the tailstock 4, an angular displacement sensor 19 is installed on the outer wall of the connecting rod 29, the model of the angular displacement sensor 19 is not particularly limited, the actual use requirement is met, the number of turns of the roller brush 13 is known by using the angular displacement sensor 19, the model is transmitted to a controller 20, the controller 20 transmits the model to a submersible pump 15, the submersible pump 15 starts to work, one side of the angular displacement sensor 19 is electrically connected with the controller 20, the model of the controller 20 is not particularly limited, the actual use requirement is met, and the controller 20 is fixedly connected to the side wall of the tailstock 4;

in the specific implementation process, the number of turns of the roller brush 13 is known by utilizing the angular displacement sensor 19, the model is transmitted to the controller 20, the controller 20 transmits the model to the submersible pump 15, so that the submersible pump 15 starts to work, the monitoring of the number of turns of the roller brush 13 is realized by the cooperation of the roller 18, the angular displacement sensor 19 and the controller 20, a user can conveniently start the submersible pump 15 periodically, and the water spray supply is carried out on the roller brush 13, meanwhile, the structural design is simple, the rapid operation of the user is facilitated, the work load of the user is reduced, and the work efficiency is improved;

further, the top of the middle frame 2 is fixedly connected with a supporting frame 7, the top of the supporting frame 7 is fixedly connected with a motor 8, the model of the motor 8 is not particularly limited, the practical use requirement is met, the motor 8 is provided with a speed reducer, the output end of the motor 8 is fixedly connected with a belt pulley 30, the outer wall of the belt pulley 30 is movably connected with a belt 9, the belt pulley 30 is rotationally connected with the driving roller 5 through the belt 9, and the motor 8 is started to drive the belt pulley 30 so as to drive the driving roller 5 to rotate through the belt 9;

in the specific implementation process, it is worth particularly pointing out that the model of the motor 8 is not particularly limited, the actual use requirement is met, the motor 8 is provided with a speed reducer, the motor 8 is started to drive the belt pulley 30, the belt 9 is further used for driving the driving roller 5 to rotate, the driving roller 5 is driven by the motor 8, the belt 9 and the belt pulley 30, and the driving roller 5 is driven by the cooperation of the motor 8, the belt 9 and the belt pulley 30, so that the motor is simple in structural design and convenient for a user to operate rapidly;

specifically, when the belt conveyor with the self-cleaning structure is used, the motor 8 is started at first, the belt pulley 30 is driven to rotate, the belt pulley 30 drives the driving roller 5 to rotate through the belt 9, the driving roller 5 rotates, the driving roller 5 drives the steering roller 6 to rotate through the conveying belt 10, so that conveying of materials is achieved, in the process, the roller brush 13 can clean impurity dust on the surface of the conveying belt 10, the roller brush 13 rotates to drive the roller 18 to rotate, at the moment, the angular displacement sensor 19 can monitor the number of rotation turns, after the rotation turns to a set number of turns, the angular displacement sensor 19 can transmit the model to the controller 20, the controller 20 transmits the model to the submersible pump 15, the submersible pump 15 starts to work, water in the box 14 is conveyed into the T-shaped pipe 16, and finally the water is sprayed out through the spray nozzle 17 to supply water to the roller brush 13.

Embodiment two: as can be seen from fig. 1, 4, 5 and 6, the inner wall of the tailstock 4 is provided with a first adjustment unit; the first adjusting unit comprises a sliding rail 21 and a first threaded rod 22; the sliding rail 21 is fixedly connected to the bottom of the inner wall of the tail frame 4, the outer wall of the sliding rail 21 is in sliding clamping connection with the steering roller 6, the sliding rail 21 plays a limiting role on the steering roller 6, so that the steering roller 6 can only transversely slide, the side wall of the steering roller 6 is rotationally connected with a first threaded rod 22 through a bearing, the first threaded rod 22 is rotated to drive the steering roller 6 to slide along the sliding rail 21, and therefore the change of the tension of the conveying belt 10 is realized, and the first threaded rod 22 is in threaded connection with the side wall of the tail frame 4;

in the specific implementation process, it is worth particularly pointing out that the sliding rail 21 plays a limiting role on the steering roller 6, so that the steering roller 6 can only transversely slide, the first threaded rod 22 is rotated to drive the steering roller 6 to slide along the sliding rail 21, the change of the tension of the conveying belt 10 is realized, the position of the steering roller 6 is adjusted through the matching of the sliding rail 21, the first threaded rod 22 and the steering roller 6, the change of the tension of the conveying belt 10 is realized, and meanwhile, the structure design is simple, and the quick operation of a user is facilitated;

further, the inner wall of the middle frame 2 is provided with a second adjusting unit; the second adjusting unit comprises a sliding block 23, a second threaded rod 24, an L-shaped plate 25, a first conical gear 26, a second conical gear 27 and a hand wheel 28; the top of the sliding block 23 is fixedly connected with the bottom of the upper carrier roller 11, the sliding block 23 is in sliding clamping connection with the inner wall of the middle frame 2, the sliding block 23 plays a limiting role on the upper carrier roller 11, so that the upper carrier roller 11 can only transversely slide, the inner wall of the sliding block 23 is in threaded connection with a second threaded rod 24, one end of the second threaded rod 24 is in rotary connection with the inner wall of the middle frame 2 through a bearing, the other end of the second threaded rod 24 is in rotary connection with an L-shaped plate 25 through a bearing, the L-shaped plate 25 is fixedly connected with the bottom of the inner wall of the middle frame 2, the tail end of the second threaded rod 24 is fixedly connected with a first conical gear 26, one side of the first conical gear 26 is in meshed connection with a second conical gear 27, the tail end of the second conical gear 27 penetrates through the L-shaped plate 25 and is in rotary connection with the L-shaped plate 25 through a bearing, the tail end of the second conical gear 27 is fixedly connected with a hand wheel 28, the hand wheel 28 is convenient for a user to rotate the second conical gear 27, a time-saving and labor-saving effect is achieved, the second conical gear 27 drives the first conical gear 26 meshed with the second threaded rod to rotate, and then drives the second conical gear 24 to rotate, and the sliding block 23 connected with the second threaded rod 24 to the inner wall of the middle frame 2 along the inner wall of the middle frame 2, and the position of the sliding block is finally changed and the position of the upper carrier roller 11 is fixedly connected;

in the specific implementation process, it is worth particularly pointing out that the sliding block 23 plays a limiting role on the upper carrier roller 11, so that the upper carrier roller 11 can only transversely slide, the adjustment of the distance between the upper carrier rollers 11 is realized through the matching of the sliding block 23, the second threaded rod 24 and the first conical gear 26, the adjustment is convenient for a user according to the loose density of the actual conveyed materials, and the stability and the service life of the whole operation of the conveyor are further ensured;

specifically, when the user wants to adjust the tension degree of the conveyor belt 10, i.e. rotate the first threaded rod 22, the steering roller 6 is driven to slide along the sliding rail 21, so as to change the tension degree of the conveyor belt 10, when the user wants to adjust the distance between the upper rollers 11 according to the loose density of the actually conveyed materials, the hand wheel 28 is rotated first, so that the second bevel gear 27 drives the first bevel gear 26 meshed with the second bevel gear to rotate, and then drives the second threaded rod 24 to rotate, and then drives the sliding block 23 in threaded connection with the second threaded rod 24 to slide transversely along the inner wall of the intermediate frame 2, so as to finally change the position of the upper roller 11 fixedly connected with the sliding block 23.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The term "comprising" an element defined by the term "comprising" does not exclude the presence of other identical elements in a process, method, article or apparatus that comprises the element.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a from belt conveyor of taking clearance structure, includes bottom plate (1), its characterized in that: a conveying belt (10) is arranged above the bottom plate (1), and a cleaning unit is arranged below the conveying belt (10);

the cleaning unit comprises a roller brush (13), a box body (14), a submersible pump (15), a T-shaped pipe (16) and a spray head (17);

the roller brush (13) is located one side below of conveyer belt (10), the below of roller brush (13) is provided with box (14), box (14) rigid coupling is in the top of bottom plate (1), the inner wall bottom rigid coupling of box (14) has immersible pump (15), the output intercommunication of immersible pump (15) has T type pipe (16), the top of box (14) is run through to T type pipe (16), the top intercommunication of T type pipe (16) has a plurality of shower nozzles (17).

2. A belt conveyor with a self-cleaning structure as in claim 1 wherein: the top rigid coupling of bottom plate (1) has middle frame (2), one side rigid coupling of middle frame (2) has headstock (3), the opposite side rigid coupling of middle frame (2) has tailstock (4), the top of middle frame (2) is provided with a plurality of upper idler (11), a plurality of lower idler (12) are installed to the bottom of middle frame (2), the top of headstock (3) is provided with driving roller (5), the outer wall and the conveyer belt (10) activity of driving roller (5) link to each other, driving roller (5) are connected with steering roller (6) through conveyer belt (10) rotation, steering roller (6) set up in the inboard of tailstock (4), the inner wall top and the upper idler (11) activity of conveyer belt (10) link to each other, the inner wall bottom and the lower idler (12) activity of conveyer belt (10) link to each other, cylinder brush (13) are connected in tailstock (4) through the round pin axle rotation.

3. A belt conveyor with a self-cleaning structure as in claim 1 wherein: a monitoring unit is arranged below the roller brush (13);

the monitoring unit comprises a roller (18), an angular displacement sensor (19), a connecting rod (29) and a controller (20);

the roller (18) is located the below of cylinder brush (13), gyro wheel (18) are connected with connecting rod (29) through the round pin axle rotation, the end rigid coupling of connecting rod (29) is in the lateral wall of tailstock (4), angular displacement sensor (19) are installed to the outer wall of connecting rod (29), one side electric connection of angular displacement sensor (19) has controller (20), controller (20) rigid coupling is in the lateral wall of tailstock (4).

4. A belt conveyor with a self-cleaning structure as in claim 2 wherein: the top rigid coupling of intermediate frame (2) has support frame (7), the top rigid coupling of support frame (7) has motor (8), the output rigid coupling of motor (8) has belt pulley (30), the outer wall swing joint of belt pulley (30) has belt (9), belt pulley (30) are rotated with driving roller (5) through belt (9) and are linked together.

5. A belt conveyor with a self-cleaning structure as in claim 2 wherein: the inner wall of the tail frame (4) is provided with a first adjusting unit;

the first adjusting unit comprises a sliding rail (21) and a first threaded rod (22);

the sliding rail (21) is fixedly connected to the bottom of the inner wall of the tail frame (4), the outer wall of the sliding rail (21) is in sliding clamping connection with the steering roller (6), a first threaded rod (22) is rotatably connected to the side wall of the steering roller (6) through a bearing, and the first threaded rod (22) is in threaded connection with the side wall of the tail frame (4).

6. A belt conveyor with a self-cleaning structure as in claim 2 wherein: the inner wall of the middle frame (2) is provided with a second adjusting unit;

the second adjusting unit comprises a sliding block (23), a second threaded rod (24), an L-shaped plate (25), a first conical gear (26), a second conical gear (27) and a hand wheel (28);

the top of slider (23) is fixedly connected with the bottom of upper idler (11), the inner wall of slider (23) slip joint in intermediate frame (2), the inner wall threaded connection of slider (23) has second threaded rod (24), the one end of second threaded rod (24) is rotated with the inner wall of intermediate frame (2) through the bearing and is linked together, the other end of second threaded rod (24) is rotated through the bearing and is connected with L template (25), L template (25) rigid coupling is in the inner wall bottom of intermediate frame (2), the end rigid coupling of second threaded rod (24) has first conical gear (26), one side meshing of first conical gear (26) is connected with second conical gear (27), the end of second conical gear (27) runs through L template (25) to rotate with L template (25) through the bearing and link, the end rigid coupling of second conical gear (27) has hand wheel (28).